# OWASP API Security Top 10
Confidence: high
Last verified: 2026-05-22
Generation: human_only


## TL;DR

The OWASP API Security Top 10 is a dedicated list of the most critical API security risks, separate from the general web application Top 10. It addresses API-specific threats: broken object-level authorization, broken authentication, excessive data exposure, lack of rate limiting.

## Core Explanation

API1:2023 Broken Object Level Authorization (BOLA) — user accesses other users' data by modifying ID in URL. API2:2023 Broken Authentication — weak JWT validation, no MFA. API3:2023 Broken Object Property Level Authorization — mass assignment vulnerabilities. API4:2023 Unrestricted Resource Consumption — no rate limiting enables DoS. Every API developer should review this list.

## Further Reading

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